[Elecraft] PX3 - odd 'missing' signal

[dmb at lightstream.net]

I have noticed this null as well. In SSB mode, the null is right at the
carrier frequency. In CW mode, the null is offset from the carrier
frequency by the amount of the sidetone pitch. Engaging ALT switches the
null to the other side of the carrier, again by the amount of the sidetone
pitch.

I don't recall seeing this on earlier versions of the firmware (though
that doesn't mean it wasn't there)

Firmware versions here are:

PX3
Firmware version: 01.16

KX3:
uC: 02.30
dsP: 01.32

73, Dale
WA8SRA




> I've noticed on various modes/combinations of spans, I show some what look
> like null regions. Sometimes it's right where I'm tuned, sometimes it's
> offset. In this picture, I am tuned to 14.055.050, in CW mode, span is 2,
> and there is a deep null area centered somewhere around 14.056.05.
>
> In some modes, this is troublesome, especially when it's right on the
> cursor where I am tuned. I must be doing something wrong, so would
> appreciate any feedback you can give me regarding this / how to fix it.
>
> Here's an image showing what I am talking about:
> http://ormandj.corenode.com/images/radio/elecraft/px3-null.jpg
>
> Thank you
> David